[GitHub] spark pull request #16094: [SPARK-18541][Python]Add metadata parameter to py...

[shea-parkes <gi...@git.apache.org>]

Github user shea-parkes commented on a diff in the pull request:

    https://github.com/apache/spark/pull/16094#discussion_r94609053
  
    --- Diff: python/pyspark/sql/column.py ---
    @@ -298,19 +299,34 @@ def isin(self, *cols):
         isNotNull = _unary_op("isNotNull", "True if the current expression is not null.")
     
         @since(1.3)
    -    def alias(self, *alias):
    +    def alias(self, *alias, **kwargs):
             """
             Returns this column aliased with a new name or names (in the case of expressions that
             return more than one column, such as explode).
     
    +        Optional ``metadata`` keyword argument can be passed when aliasing a single column.
    --- End diff --
    
    Congrats on the release of v2.1.  I believe the `versionchanged` target of v2.2 is now accurate.


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